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One of the most important qualities, particularly for high precision and high performance machining applications, is dynamic stiffness. This technology is primarily constrained by the spindle’s capabilities, which have a big impact on the accuracy of the machining.
The dynamic behaviour of the spindle system, which is frequently described as the frequency response function (FRF) at the tool tip, affects the chatter stability of the tool. In other words, a crucial factor in determining the stability limit is the tool-tip FRF.
The Global High Rigidity Spindle market accounted for $XX Billion in 2021 and is anticipated to reach $XX Billion by 2030, registering a CAGR of XX% from 2022 to 2030.
Great rigidity and high stability are provided by the Haas-designed 15,000 rpm HSK-A63 spindle for high-speed, extended-reach machining applications. With dual contact between the taper and the spindle face, the HSK (Hohl Shaft Kegel, or hollow-shank taper) tooling creates an extremely robust connection that delivers exceptional axial and radial precision, especially at high spindle speeds.
For shops using long-reach tools or needing increased rigidity and accuracy at high speeds, the HSK-A63 spindle is an excellent solution. Dual contact between the spindle face and taper is provided by the HSK tooling, resulting in a particularly rigid connection.
High stiffness and high accuracy dual-contact taper, Long-reach tool holders that are more robust, spindle speeds and feed rates that are 50% faster than the 10,000 rpm spindle, improved 3D profiling performance, When employing small cutting tools, improved performance necessitates balanced toolholders with G2.5 ratings higher than 10,000 rpm.
The Puma GT 2100 and 2600 models are being replaced by the High Rigidity Spindle new Puma DNT 2100 and 2600 from DN Solutions. The Puma DNT Series, according to DN Solutions, has the strongest spindle in its class, a new turret body, and a live tool drive that provide efficient and accurate machining. The new machines are built with ease of use and maintenance in mind.
Similar to the GT Series, the DNT Series uses box guideways on all axes to reduce vibration, guarantee dynamic rigidity, and produce strong and accurate machining during heavy-duty cutting. The DNT Series’ improved bed design, which includes a larger guideway span and saddle width, a greater rigidity bearing arrangement in the main spindle, and the adoption of a High Rigidity Spindle, low-temperature live tool drive are all examples of stiffness increases.
An ergonomic control panel with an iHMI touch screen that can be adjusted in height, a larger maintenance area, and the addition of an inverter-type chip converter with a 45° incline cover design for better chip handling are all convenience features on the DNT Series.
The spindle construction of the Puma DNT Series has been optimized, and the temperature adjustment function has been included (optional). Thermal deformation is reduced by the new live tool drive’s low heat-generating bearing.
There are two-axis and milling versions of the DNT Series available. Both include a 25 horsepower (18.6 kW) or 35 horsepower (26.1 kW) motor that rotates the spindle between 3,500 and 4,500 revolutions per minute. Both designs share the same chuck sizes, which range from 8″ to 12″ in diameter.
The two-axis versions’ maximum turning diameter and length are 398.8–460 mm and 15.7–18.1–21.6–42.4 inches, respectively (549-1077 mm). The milling versions have a 12.6″–14.7″ maximum turning diameter (320-373 mm). 19.7″-40.5″ is the maximum turning length (500 mm-1029 mm). The 6,000 rpm BMT-55 live tooling turret is driven by a 7.5 hp (5.6 kW) engine.
A high torque spindle, servo tailstock, servo automatic door, and other options increase the DNT Series’ versatility. A parts conveyor and several bar feeders are available for light automation.